EP 3886318 A1 20210929 - CURRENT MIRROR ARRANGEMENTS WITH ADJUSTABLE OFFSET BUFFERS
Title (en)
CURRENT MIRROR ARRANGEMENTS WITH ADJUSTABLE OFFSET BUFFERS
Title (de)
STROMSPIEGELANORDNUNGEN MIT VERSTELLBAREN OFFSET-PUFFERN
Title (fr)
AGENCEMENTS DE MIROIR DE COURANT À TAMPONS DE DÉCALAGE RÉGLABLES
Publication
Application
Priority
US 202016832144 A 20200327
Abstract (en)
An example current mirror arrangement includes a current mirror circuit, configured to receive an input current signal at an input transistor Q1 and output a mirrored signal at an output transistor Q2. The arrangement further includes a buffer amplifier circuit, having an input coupled to Q1 and an output coupled to Q2. The offset of the buffer amplifier circuit can be adjusted by including circuitry for an input or an output side offset adjustment or by implementing the buffer amplifier circuit as a diamond stage with individually controlled current sources for each of the transistors of the diamond stage. Providing an adjustable offset buffer in a current mirror arrangement may advantageously allow benefiting from the use of a buffer outside of a feedback loop of a current mirror, while being able to reduce the buffer offset due to mismatch between master and slave sides of the current mirror circuit.
IPC 8 full level
H03F 3/30 (2006.01); G05F 3/26 (2006.01); H03F 1/30 (2006.01); H03F 3/45 (2006.01)
CPC (source: CN EP US)
G05F 3/262 (2013.01 - CN EP); G05F 3/265 (2013.01 - EP US); H03F 1/30 (2013.01 - EP); H03F 3/3066 (2013.01 - EP); H03F 3/3069 (2013.01 - US); H03F 3/3076 (2013.01 - EP); H03F 3/45273 (2013.01 - EP); H03F 3/456 (2013.01 - US); H03F 2203/30006 (2013.01 - US)
Citation (search report)
- [YA] EP 2187518 A1 20100519 - SONY CORP [JP]
- [YA] EP 0209987 A2 19870128 - COMLINEAR CORP [US]
- [YA] JP H07235843 A 19950905 - FUJITSU LTD
- [YA] US 5003269 A 19910326 - LEHMANN KLAUS [DE]
- [YA] EP 3447913 A1 20190227 - HARMAN INT IND [US]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3886318 A1 20210929; CN 113448375 A 20210928; CN 113448375 B 20230228; EP 4451559 A2 20241023; TW 202141219 A 20211101; TW I775362 B 20220821; US 11188112 B2 20211130; US 2021303018 A1 20210930
DOCDB simple family (application)
EP 21164433 A 20210323; CN 202110323165 A 20210326; EP 24198436 A 20210323; TW 110110574 A 20210324; US 202016832144 A 20200327